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2. Quadrant (plane geometry) - Wikipedia

   en.wikipedia.org/wiki/Quadrant_(plane_geometry)

   Signs of trigonometric functions in each quadrant. In the above graphic, the words in quotation marks are a mnemonic for remembering which three trigonometric functions (sine, cosine and tangent) are positive in each quadrant. The expression reads "All Science Teachers Crazy" and proceeding counterclockwise from the upper right quadrant, we see ...

3. Mnemonics in trigonometry - Wikipedia

   en.wikipedia.org/wiki/Mnemonics_in_trigonometry

   Signs of trigonometric functions in each quadrant. All Students Take Calculus is a mnemonic for the sign of each trigonometric functions in each quadrant of the plane. The letters ASTC signify which of the trigonometric functions are positive, starting in the top right 1st quadrant and moving counterclockwise through quadrants 2 to 4.

4. Quadrature (geometry) - Wikipedia

   en.wikipedia.org/wiki/Quadrature_(geometry)

   In mathematics, particularly in geometry, quadrature (also called squaring) is a historical process of drawing a square with the same area as a given plane figure or computing the numerical value of that area. A classical example is the quadrature of the circle (or squaring the circle).

5. Orthant - Wikipedia

   en.wikipedia.org/wiki/Orthant

   In geometry, an orthant [1] or hyperoctant [2] is the analogue in n-dimensional Euclidean space of a quadrant in the plane or an octant in three dimensions. In general an orthant in n-dimensions can be considered the intersection of n mutually orthogonal half-spaces. By independent selections of half-space signs, there are 2 n orthants in n ...

6. File:The Fathiyya Essay on Using the Mughayyab Quadrant ...

   en.wikipedia.org/wiki/File:The_Fathiyya_Essay_on...

   better known as Sibt al-Maridini, includes an introduction, 20 sections, and a conclusion. The treatise discusses a range of issues in astronomy, surveying, and mathematics. It describes the sine quadrant and parallel circles, and explains how to measure the width of a river, the angle of a star, the depth of a well, or the height of a mountain.

7. Play Hearts Online for Free - AOL.com

   www.aol.com/games/play/masque-publishing/hearts

   Enjoy a classic game of Hearts and watch out for the Queen of Spades!